CN218951651U - Non-woven fabric for ultra-soft wet tissues and obtained wet tissues - Google Patents
Non-woven fabric for ultra-soft wet tissues and obtained wet tissues Download PDFInfo
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- CN218951651U CN218951651U CN202121974779.9U CN202121974779U CN218951651U CN 218951651 U CN218951651 U CN 218951651U CN 202121974779 U CN202121974779 U CN 202121974779U CN 218951651 U CN218951651 U CN 218951651U
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Abstract
The utility model discloses a non-woven fabric for an ultra-soft wet tissue and the wet tissue obtained. The non-woven fabric comprises an upper surface fiber layer I, an intermediate layer II and a lower surface fiber layer III; wherein the upper surface fiber layer I and the lower surface fiber layer III are cellulose fibers, the cellulose fibers are fine denier fibers and/or superfine denier fibers, and the fiber length is 38-45mm; the middle layer II is natural plant fiber; based on the total weight of the non-woven fabric, the upper surface fiber layer I and the lower surface fiber layer III respectively account for 10-30wt% and the middle layer II accounts for 40-80wt%; the upper surface fiber layer I, the middle layer II and the lower surface fiber layer III are mutually cohesive and entangled through water needling, so that a whole with certain strength is formed. The wet tissue prepared by the non-woven fabric has the advantages of relatively reasonable price, biodegradability, softness, fineness and low skin irritation.
Description
Technical Field
The utility model relates to the technical field of wet towel manufacturing, in particular to a non-woven fabric for super soft wet towels and the wet towels obtained.
Background
Wet wipes are moist wipes that are used to wipe the skin. Wet wipes can be broadly divided into two categories: one type is that the skin care agent is sterilized but cannot sterilize other articles, and skin care components are contained in the skin care agent and can only be used for moistening and maintaining the skin; the other type is a disinfection wet tissue which is not only disinfected per se, but also has a disinfection effect on other articles, and can be used for disinfecting or sterilizing skin scratches, scratches and the like.
Along with the release of the fertility policy and the improvement of the living standard of people, the utilization rate of the cosmetic product is also increased, the use of wet tissue products is also increased by well spraying, and particularly, the wet tissue for infants and the wet tissue for makeup removal has great development potential in the future.
At present, wet towel (base) cloth in the market is mainly spun-laced non-woven fabrics, and the materials used by the wet towel (base) cloth are mainly pure cotton, viscose, terylene and the like. The trend in the future wet tissues must be degradable, environmentally friendly materials. Wet tissues with polyester materials are often adopted in the market, but the wet tissues cannot meet the environment-friendly requirement.
In order to be environment-friendly and degradable, the materials of pure cotton and viscose should be selected, but the selection of the materials has some problems: 1. the production cost is high; 2. the softness is not high enough, and the use feeling of the makeup removing wet tissues and the infant wet tissues is greatly influenced; 3. the wet tissue of the all-cellulose fiber has high requirements on the anti-corrosion performance, and the common wet tissue formula can not meet the requirements.
Chinese patent application 202110000372.4 discloses a nonwoven fabric of composite structure and a wet wipe, the nonwoven fabric comprising a water-absorbent composite region and a non-water-absorbent composite region, the water-absorbent composite region comprising at least two face layers and at least one intermediate layer sandwiched between the face layers, the non-water-absorbent composite region not comprising an intermediate layer; wherein the surface layer is made of thermosetting material, and the middle layer is made of water-absorbing material. The wet towel base fabric adopts the non-woven fabric with the composite structure. The application can save liquid finishing agent and intermediate layer material compared with conventional non-woven fabrics with an intermediate layer full-laid surface layer. However, the non-woven fabric surface layer of the application is a polyester layer, which can bring about environmental protection.
Chinese patent 202021286330.9 discloses a high water-locking disinfection wet tissue, which comprises a surface layer and a water-locking layer. Wherein the surface layer comprises a solid water layer and a mixed fiber layer; the solid water layer has a back-shaped structure and is provided with two groups of pressed together, and the solid water layer is polypropylene melt-blown cloth; the mixed fiber layers are provided with two groups and are respectively adhered to the inner walls of the two solid water layers, and an interlayer is reserved between the two surface layers; the mixed fiber layer is made of coconut carbon fiber, bamboo carbon fiber, peppermint fiber and cotton fiber. The water locking layer is pressed in the interlayer between the two surface layers, and the non-woven fabric is spun by water. The surface layer and the water locking layer are soaked by the disinfectant, the thickness of the water locking layer is not less than that of the surface layer, and the density of the water locking layer is greater than that of the surface layer. The disinfection wet tissue can efficiently lock water and improve the use times of the disinfection wet tissue. However, the polypropylene meltblown used in this patent also presents environmental concerns.
Chinese patent application 202010049668.0 discloses a kitchen cleaning wet tissue, wherein the base cloth adopted by the kitchen cleaning wet tissue is polypropylene wood pulp paper composite non-woven fabric, and the polypropylene wood pulp paper composite non-woven fabric is prepared by hot rolling and compounding an upper textile fiber silk screen layer, a middle wood pulp fiber layer and a lower polypropylene fiber web layer.
Chinese patent application 2016610193534. X discloses a degradable skin-friendly non-woven fabrics, including interconnect's surface layer, intermediate level and backing film layer together, be equipped with first enhancement layer between surface layer and the intermediate level, be equipped with the second enhancement layer between intermediate level and the backing film layer, the surface layer is polylactic acid fiber layer, and the intermediate level is hydrophilic plant cotton fiber, and the backing film layer includes super gentle unit layer, antistatic fiber layer and the elastic fiber layer that blocks water that sets gradually from top to bottom. The middle layer is respectively bonded with the first reinforcing layer and the second reinforcing layer through viscose fibers, and then is connected with the surface layer and the bottom film layer through a hot air fusion mode. The degradable skin-friendly non-woven fabric disclosed by the patent application is good in hydrophilicity, is particularly suitable for various feminine hygiene products, infant paper diapers, disposable surgical clothes, caps, masks and the like, but is too coarse for infant wet tissues and makeup removal wet tissues with low irritation.
Chinese patent 201580043241.7 discloses a dispersible nonwoven fabric, a method of making a dispersible nonwoven fabric, and a wipe or tissue. Wherein the dispersible nonwoven fabric comprises 70wt% to 90wt% of natural pulp fibers based on the total weight of the nonwoven fabric and 10wt% to 30wt% of cellulosic fibers based on the total weight of the nonwoven fabric. At least a portion of the pulp fibers and at least a portion of the cellulosic fibers are entangled with each other. At least 20% of the natural pulp fibers have a fiber coarseness of 1.0dtex to 2.0 dtex. The dispersible nonwoven fabric of this patent is suitable for making tissues that can be flushed away by a toilet, but when used to make wet tissues, the strength is too low.
Chinese patent 201410846946.X discloses a high-softness fine-denier cellulose spunlaced wet tissue material which is softer, finer and finer in skin pasting in wet state, does not generate relative sliding and can be subjected to percent biodegradation of a final product, and a manufacturing method of the wet tissue. Wherein, the raw materials are prepared by mixing 10-80% of cellulose fiber with the proportion fineness of less than or equal to 0.9 dtex and 5-15 mm with 90-20% of pulp which is subjected to pulp grinding and silk-separating fibrillation. The patent adopts a high-pressure fluffing technology to deeply disperse cellulose fibers with the dtex of 0.9, and adopts wood pulp fibers as a framework of the hydroentangled wet tissue so as to strengthen the strength of the cellulose fiber material. However, the preparation process of this patent produces considerable cellulose loss.
Therefore, it is necessary to provide a wet tissue base fabric (nonwoven fabric) of the all-cellulose fiber type, which has sufficient softness and strength, can meet the use requirements of makeup removing wet tissues and infant wet tissues, and has reasonable production cost.
Disclosure of Invention
The utility model aims to provide a wet tissue non-woven fabric prepared from all-cellulose fibers and a wet tissue obtained by the wet tissue non-woven fabric. The wet tissue non-woven fabric can be biodegraded, the obtained wet tissue has enough softness and strength, can meet the use requirements of specific occasions, such as makeup removing wet tissue, infant wet tissue and the like, and the cost of the preparation method is relatively low.
In order to achieve the above object, the present utility model provides a nonwoven fabric for an ultra-soft wet tissue, comprising an upper surface fiber layer I, an intermediate layer II, and a lower surface fiber layer III; the upper surface fiber layer I and the lower surface fiber layer III are cellulose fibers, the cellulose fibers are fine denier fibers and/or superfine denier fibers, and the fiber length is 38mm-45mm; the middle layer II is natural plant fiber; based on the total weight of the non-woven fabric, the upper surface fiber layer I and the lower surface fiber layer III respectively account for 10-30wt% and the middle layer II accounts for 40-80wt%; and the upper surface fiber layer I, the middle layer II and the lower surface fiber layer III are mutually cohesive and entangled through hydroentanglement, so that a whole with certain strength is formed.
In the present utility model, the term fine fiber is a fiber having a fiber fineness of 1.0dtex to 2.4dtex, and the superfine fiber is a fiber having a fiber fineness of 0.3dtex to 1.0 dtex.
In the non-woven fabric, the cellulose fiber is textile fiber derived from natural substances, also called artificial fiber, and is obtained by remolding cellulose molecules of the non-woven fabric by using natural substances such as cotton linters, wood, bamboo, bagasse, reed and the like through a certain technological treatment method. The cellulose fiber mainly comprises viscose fiber, lyocell fiber, modal fiber, bamboo fiber, acetate fiber, cuprammonium fiber, etc.
The cellulose fiber can provide better skin feel, is soft and smooth in hand feeling, is cool and has no stimulation to skin affinity. In order to achieve ultra-softness, the cellulose fibers selected preferably have a fiber fineness of 0.6dtex to 1.1dtex and a fiber length of 38mm to 45mm.
If the fineness of the cellulose fiber is less than 0.6dtex, the fiber is too thin, the strength is too small, the loss in the carding process is too large, and the strength of the formed non-woven fabric is insufficient; if the fineness of the fibers is more than 1.1dtex, the fineness of the fibers is not enough after the wet tissue product is made due to coarse fibers, high rigidity and coarse cloth cover; if the length of the cellulose fibers is shorter than 38mm, the fibers are too short to be effectively combed in a carding machine, resulting in uneven cloth cover; if the length of the cellulose fibers is longer than 45mm, the fibers are too long, and the condition of clamping the fibers in the carding machine is easy to occur, so that the production is not smooth, and even the carding machine is stopped.
Preferably, the cellulose fiber in the present utility model is selected from more than one of viscose fiber, pure cotton fiber, bamboo fiber and modal fiber.
The viscose is prepared from natural fibers (wood fibers and cotton linters) by alkalizing, aging, sulfonating to obtain soluble cellulose xanthate, dissolving in dilute alkali solution to obtain viscose, and wet spinning. Different raw materials and spinning processes are adopted, so that common viscose fibers, high-wet-modulus viscose fibers, high-strength viscose fibers and the like can be obtained respectively.
The bamboo fiber is purified by adopting a new process, and the bamboo fiber more effectively maintains the advantages of green, environment-friendly, ecological, healthy and comfortable properties of the bamboo fiber and the characteristic of no pollution of biodegradation to the environment. The bamboo fiber has finer fineness, softness, fluffiness, lighter weight, skin affinity, strong toughness and resilience, stability and uniformity, high wear resistance and no fuzzing.
More preferably, in the nonwoven fabric of the present utility model, the surface fiber layer is made of viscose fiber.
In the nonwoven fabric of the present utility model, the natural plant fibers of the intermediate layer are preferably wood pulp fibers and/or bamboo pulp fibers.
In order to achieve the above object, the present utility model also provides a method for preparing a nonwoven fabric for the super soft wet tissues, comprising the steps of:
(1) Forming an upper surface fiber layer I and a lower surface fiber layer III: carding the selected cellulose fibers into a thin fiber net by a carding machine, and then lapping the thin fiber net by a cross lapping machine to form a nascent fiber net;
(2) Forming an intermediate layer II: pulping (such as mechanical pulping) the pulp board, scattering into single fiber fluff pulp by using a physical scattering method, then screening the pulp to form a net, and pressing and drying to form an intermediate layer II;
(3) Hydroentangled to form a whole: sequentially superposing the upper surface fiber layer I, the middle layer II and the lower surface fiber layer III obtained in the steps (1) and (2), and rebounding the high-pressure water jet with the net-forming curtain to form a puncture effect by water jet so as to mutually cohesion and entanglement the fibers of each layer to form a whole with certain strength;
(4) And (3) drying, winding, slitting into rolls and packaging the whole obtained in the step through drying equipment for later use.
Wherein in the step (2), the pulp sheet used is preferably a fluff pulp sheet made of wood/bamboo; the drying temperature in the drying process can be 120-150 ℃. Compared with the common pulp board, the fluff pulp board has longer fibers and good strength, is easily dissociated into single fibers, and generates less dust during processing and raising.
The principle of the hydroentangled fiber web is similar to that of the needling process, but instead of needling, a plurality of fine water jets generated by high pressure, namely a hydroentangler, are adopted to spray the fiber web. After the water jet passes through the fiber web, the fiber web is supported by the rebound of the net curtain and is penetrated again, so that the fibers in the fiber web are displaced, penetrated, entangled and cohesive under the hydraulic action of the high-speed water jet penetration in different directions, and the fiber web is reinforced. The method is characterized in that: flexible entanglement does not affect the original characteristics of the fibers and does not damage the fibers; the appearance is more similar to traditional textiles than other nonwoven materials; etc.
Preferably, in the process of forming the whole by the hydroentanglement in the above step (3) of the present utility model, the hydroentanglement process further includes a prewetting step of which the water pressure is 5 to 10bar in the gauge pressure.
More preferably, in the hydroentangling process of step (3), it includes 6 hydroentangling processes, wherein the water pressures of the 6 hydroentangling processes are respectively (gauge pressure): 25-35bar, 35-55bar, 50-70bar, 55-75bar, 45-65bar, 40-60bar.
Since the surface fiber layer in the nonwoven fabric of the present utility model may be a commercially available cellulose fiber, the cost of the nonwoven fabric of the present utility model can be reduced to a large extent.
The upper and lower fiber layers and the middle layer are organically combined into a whole through the water jet process, and the non-woven fabric has good softness due to the fact that the fiber fineness of the upper and lower fiber layers is small and the middle layer adopts natural short fibers; meanwhile, the upper and lower fiber layers contacting the skin are fine in fiber and fine in fineness; therefore, the wet tissue non-woven fabric has the characteristics of softness and fineness, and meanwhile, the product price is low, and the wet tissue non-woven fabric is particularly suitable for baby wet tissues and makeup removing wet tissues.
In order to achieve the above object, the present utility model further provides a method for preparing an ultra-soft wet tissue prepared by using the above nonwoven fabric, wherein the nonwoven fabric is impregnated with a liquid preservative system.
In the utility model, the non-woven fabric used for the ultra-soft wet tissue adopts natural cellulose fibers and natural plant fibers, the fibers are tiny, and have higher challenges on the stability of the formula and the effectiveness of corrosion prevention, so that the utility model introduces a special formula corrosion prevention system for the situation, and the special formula corrosion prevention system is specifically as follows:
p-hydroxyacetophenone 0.25-0.4%
Octanoyl hydroxamic acid 0.08-0.15%
The balance being purified water.
The softness of the formula is particularly important for fragile skin, especially infants and beauty lovers who often remove makeup. The extremely simple, efficient and low-irritation anti-corrosion system can meet the high anti-corrosion requirement of the ultra-soft wet tissue non-woven fabric and is very friendly to the skin. The preservative system is p-hydroxyacetophenone and octanoyl hydroxamic acid, is a non-traditional preservative, has the effects of preserving and synergistic effects after being compounded, can well solve the problem that the product using cellulose fiber as a non-woven fabric carrier has reduced antiseptic capability to bacteria, and meanwhile, compared with the traditional preservative system, the formula of the preservative system has better mildness, and is more suitable for wet tissue products for infants and makeup removing people.
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Drawings
Fig. 1 is a nonwoven fabric structure for use in an ultra-soft wet wipe according to one embodiment of the present utility model.
Detailed Description
Example 1
First, a nonwoven fabric for an ultra-soft wet tissue was prepared by the following method, which comprises the steps of:
(1) Forming an upper surface fiber layer I and a lower surface fiber layer III: carding the selected cellulose fibers into a thin fiber net by a carding machine, and then lapping the thin fiber net by a cross lapping machine to form a nascent fiber net; wherein, the cellulose fiber selected is viscose fiber with the fiber fineness of 0.6 dtex;
(2) Forming an intermediate layer II: preparing slurry from a wood slurry plate by a mechanical pulping method, physically scattering the slurry into single fiber fluff slurry, then, screening the slurry for forming, and then, pressing and drying at 120 ℃ to form an intermediate layer II;
(3) Hydroentangled to form a whole: sequentially superposing the upper surface fiber layer I, the middle layer II and the lower surface fiber layer III obtained in the steps (1) and (2); prewetting under the water pressure with the gauge pressure of 5bar, and then performing 6 hydroentangling procedures to enable the high-pressure hydroentangled net curtain to rebound to form a puncturing effect, so that all layers of fibers are mutually enmeshed and entangled to form a whole with certain strength; the water pressures of the 6 hydroentanglement procedures are respectively (gauge pressure): 25-35bar, 35-55bar, 50-70bar, 55-75bar, 45-65bar, 40-60bar;
(4) Drying, winding, slitting into rolls and packaging the whole obtained in the step through drying equipment for later use;
wherein, based on the total weight of the non-woven fabric, the upper surface fiber layer I and the lower surface fiber layer III respectively account for 10 weight percent, and the middle layer II accounts for 80 weight percent.
Secondly, immersing the prepared non-woven fabric into an anti-corrosion system to form the wet tissue:
p-hydroxyacetophenone 0.40%
Octanoyl hydroxamic acid 0.15%
The balance being purified water.
Example 2
First, a nonwoven fabric for an ultra-soft wet tissue was prepared by the following method, which comprises the steps of:
(1) Forming an upper surface fiber layer I and a lower surface fiber layer III: carding the selected cellulose fibers into a thin fiber net by a carding machine, and then lapping the thin fiber net by a cross lapping machine to form a nascent fiber net; wherein, the cellulose fiber selected is viscose fiber with the fiber fineness of 1.1 dtex;
(2) Forming an intermediate layer II: preparing slurry from the bamboo pulp board by a physical method, physically scattering the slurry into single fiber fluff pulp, then, screening the slurry for forming, and then, pressing and drying at 150 ℃ to form an intermediate layer II;
(3) Hydroentangled to form a whole: sequentially superposing the upper surface fiber layer I, the middle layer II and the lower surface fiber layer III obtained in the steps (1) and (2); prewetting under the water pressure with the gauge pressure of 10bar, and then performing 6 hydroentangling procedures to enable the high-pressure hydroentangled net curtain to rebound to form a puncturing effect, so that all layers of fibers are mutually enmeshed and entangled to form a whole with certain strength; the water pressures of the 6 hydroentanglement procedures are respectively (gauge pressure): 25-35bar, 35-55bar, 50-70bar, 55-75bar, 45-65bar, 40-60bar;
(4) Drying, winding, slitting into rolls and packaging the whole obtained in the step through drying equipment for later use;
wherein, based on the total weight of the non-woven fabric, the upper surface fiber layer I and the lower surface fiber layer III respectively account for 20 weight percent, and the middle layer II accounts for 60 weight percent.
Secondly, immersing the prepared non-woven fabric into an anti-corrosion system to form the wet tissue:
p-hydroxyacetophenone 0.25%
Octanoyl hydroxamic acid 0.08%
The balance being purified water.
Example 3
First, a nonwoven fabric for an ultra-soft wet tissue was prepared by the following method, which comprises the steps of:
(1) Forming an upper surface fiber layer I and a lower surface fiber layer III: carding the selected cellulose fibers into a thin fiber net by a carding machine, and then lapping the thin fiber net by a cross lapping machine to form a nascent fiber net; wherein, the cellulose fiber selected is the mixture of viscose fiber with the fineness of 0.8dtex and pure cotton fiber;
(2) Forming an intermediate layer II: preparing bamboo pulp board into pulp by physical pulping method, physically scattering into single fiber fluff pulp, then forming the pulp by net, squeezing, drying at 140 deg.C to form middle layer II;
(3) Hydroentangled to form a whole: sequentially superposing the upper surface fiber layer I, the middle layer II and the lower surface fiber layer III obtained in the steps (1) and (2); prewetting under the water pressure with the gauge pressure of 8bar, and then performing 6 hydroentangling procedures to enable the high-pressure hydroentangled net curtain to rebound to form a puncturing effect, so that all layers of fibers are mutually enmeshed and entangled to form a whole with certain strength; the water pressures of the 6 hydroentanglement procedures are respectively (gauge pressure): 25-35bar, 35-55bar, 50-70bar, 55-75bar, 45-65bar, 40-60bar;
(4) Drying, winding, slitting into rolls and packaging the whole obtained in the step through drying equipment for later use;
wherein, based on the total weight of the non-woven fabric, the upper surface fiber layer I and the lower surface fiber layer III respectively account for 30 weight percent, and the middle layer II accounts for 40 weight percent.
Secondly, immersing the prepared non-woven fabric into an anti-corrosion system to form the wet tissue:
p-hydroxyacetophenone 0.35%
Octanoyl hydroxamic acid 0.12%
The balance being purified water.
Claims (4)
1. The non-woven fabric for the ultra-soft wet tissue is characterized by comprising an upper surface fiber layer I, an intermediate layer II and a lower surface fiber layer III;
the upper surface fiber layer I and the lower surface fiber layer III are cellulose fibers, the cellulose fibers are fine denier fibers and/or superfine denier fibers, and the fiber length is 38-45mm;
the middle layer II is natural plant fiber;
wherein the fine denier fiber is fiber with the fiber fineness of 1.0dtex-2.4dtex, and the superfine denier fiber is fiber with the fiber fineness of 0.3dtex-1.0 dtex;
the upper surface fiber layer I, the middle layer II and the lower surface fiber layer III are mutually cohesive and entangled through hydroentanglement, so that a whole with certain strength is formed.
2. The nonwoven fabric according to claim 1, wherein the cellulose fiber is one or more selected from the group consisting of viscose fiber, bamboo fiber, modal fiber and lyocell fiber.
3. The nonwoven fabric according to claim 1, wherein the cellulose fibers have a fiber fineness of 0.6dtex to 1.1dtex.
4. An ultra-soft wet wipe comprising the nonwoven fabric according to any one of claims 1-3, which is impregnated with a liquid preservative system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121974779.9U CN218951651U (en) | 2021-08-20 | 2021-08-20 | Non-woven fabric for ultra-soft wet tissues and obtained wet tissues |
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| CN202121974779.9U CN218951651U (en) | 2021-08-20 | 2021-08-20 | Non-woven fabric for ultra-soft wet tissues and obtained wet tissues |
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